Motorola DS3478 - Manual (Page 43)

Digital Scanning 2 - 13
DS3478-HD/DPM Near Focus - 2D Codes
Figure 2-11 DS3478-HD/DPM Near Focus Decode Zone - 2D Codes
In.
cm
0
10 mil QR Code
Depth of Field
2.54
0.5 1.0 1.5 2.0
0 1.3 2.5 3.8 5.1
5 mil QR Code
2.34
5 mil Data Matrix
1.96
0.63 2.00
7.5 mil QR Code
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
0.35 0.9
0.7 1.8
1.8
* Minimum distance determined by symbol length and scan angle.
0.35
0.7
0.9
in.
Note: Typical performance at 73°F (23°C)
on high quality symbols in normal room light.
Vcc = 3.3V
10 mil Data Matrix
0.5 2.42
7.5 mil Data Matrix
0.58 2.38
4 mil QR Code
0.83 1.63
Top of
scanner
4 mil Data Matrix
0.88 1.92
2.5
6.4
0.83
0.67
0.33